pcp_reference_guide_v2.5 - Tasking

2−22PCP Reference ManualLow level file access functionsStdio.h_close(fd)_lseek(fd,offset,whence)_open(fd,flags)_read(fd,*buff,cnt)_unlink(*name)_write(fd,*buffer,cnt)DescriptionUsed by the functions close and fclose.(FSS implementation)Used by all file positioning functions:fgetpos, fseek, fsetpos, ftell, rewind.(FSS implementation)Used by the functions fopen andfreopen. (FSS implementation)Reads a sequence of characters from afile. (FSS implementation)Used by the function remove.(FSS implementation)Writes a sequence of characters to a file.(FSS implementation)File accessLIBRARIESStdio.hfopen(name,mode)fclose(name)DescriptionOpens a file for a given mode. Availablemodes are:"r" read; open text file for reading"w" write; create text file for writing;if the file already exists its contentsis discarded"a" append; open existing text file orcreate new text file for writing atend of file"r+" open text file for update; readingand writing"w+" create text file for update; previouscontents if any is discarded"a+" append; open or create text file forupdate, writes at end of file(FSS implementation)Flushes the data stream and closes thespecified file that was previously openedwith fopen. (FSS implementation)